WeakReference<? extends Enum<?>> ref = Enums.getEnumConstants(enumClass).get(value);
    /*
     * We use `fromNullable` instead of `of` because `WeakReference.get()` has a nullable return
     * type.
     *
     * In practice, we are very unlikely to see `null`: The `WeakReference` to the enum constant

// reads are running.
type syncReadCloser struct {
	rc io.ReadCloser
	mu sync.Mutex
}

func (pr *syncReadCloser) Read(p []byte) (n int, err error) {
	// This ensures that Close will block until Read has completed.
	// This allows another goroutine to close the reader.
	pr.mu.Lock()
	defer pr.mu.Unlock()
	if pr.rc == nil {
		return 0, io.EOF
	}
	return pr.rc.Read(p)
}

 * retrieved from the artifact descriptor of the root dependency. And last, only direct dependencies can be specified in
 * which case the root node of the resulting graph has no associated dependency.
 *
 * @since 4.0.0
 */
@Experimental
@Immutable
public interface DependencyResolverRequest {

    enum RequestType {
        COLLECT,
        FLATTEN,
        RESOLVE
    }

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